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Title: A keystone microbial enzyme for nitrogen control of soil carbon storage

Abstract

Agricultural and industrial activities have increased atmospheric nitrogen (N) deposition to ecosystems worldwide. N deposition can stimulate plant growth and soil carbon (C) input, enhancing soil C storage. Changes in microbial decomposition could also influence soil C storage, yet this influence has been difficult to discern, partly because of the variable effects of added N on the microbial enzymes involved. We show, using meta-analysis, that added N reduced the activity of lignin-modifying enzymes (LMEs), and that this N-induced enzyme suppression was associated with increases in soil C. In contrast, N-induced changes in cellulase activity were unrelated to changes in soil C. Moreover, the effects of added soil N on LME activity accounted for more of the variation in responses of soil C than a wide range of other environmental and experimental factors. Our results suggest that, through responses of a single enzyme system to added N, soil microorganisms drive long-term changes in soil C accumulation. Incorporating this microbial influence on ecosystem biogeochemistry into Earth system models could improve predictions of ecosystem C dynamics.

Authors:
ORCiD logo [1];  [2]; ORCiD logo [3]; ORCiD logo [4];  [5]; ORCiD logo [6];  [7]
  1. Northern Arizona Univ., Flagstaff, AZ (United States); Chinese Academy of Sciences (CAS), Beijing (China); Aarhus Univ. (Denmark)
  2. Northern Arizona Univ., Flagstaff, AZ (United States); Tsinghua Univ., Beijing (China)
  3. Univ. of Exeter (United Kingdom)
  4. Northern Arizona Univ., Flagstaff, AZ (United States)
  5. Chinese Academy of Sciences (CAS), Beijing (China)
  6. East China Normal Univ. (ECNU), Shanghai (China); Shanghai Inst. of Pollution Control and Ecological Security, Shanghai (China)
  7. Northwestern Univ., Evanston, IL (United States)
Publication Date:
Research Org.:
Northern Arizona Univ., Flagstaff, AZ (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1506457
Grant/Contract Number:  
[SC0014085]
Resource Type:
Accepted Manuscript
Journal Name:
Science Advances
Additional Journal Information:
[ Journal Volume: 4; Journal Issue: 8]; Journal ID: ISSN 2375-2548
Publisher:
AAAS
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES

Citation Formats

Chen, Ji, Luo, Yiqi, van Groenigen, Kees Jan, Hungate, Bruce A., Cao, Junji, Zhou, Xuhui, and Wang, Rui-wu. A keystone microbial enzyme for nitrogen control of soil carbon storage. United States: N. p., 2018. Web. doi:10.1126/sciadv.aaq1689.
Chen, Ji, Luo, Yiqi, van Groenigen, Kees Jan, Hungate, Bruce A., Cao, Junji, Zhou, Xuhui, & Wang, Rui-wu. A keystone microbial enzyme for nitrogen control of soil carbon storage. United States. doi:10.1126/sciadv.aaq1689.
Chen, Ji, Luo, Yiqi, van Groenigen, Kees Jan, Hungate, Bruce A., Cao, Junji, Zhou, Xuhui, and Wang, Rui-wu. Wed . "A keystone microbial enzyme for nitrogen control of soil carbon storage". United States. doi:10.1126/sciadv.aaq1689. https://www.osti.gov/servlets/purl/1506457.
@article{osti_1506457,
title = {A keystone microbial enzyme for nitrogen control of soil carbon storage},
author = {Chen, Ji and Luo, Yiqi and van Groenigen, Kees Jan and Hungate, Bruce A. and Cao, Junji and Zhou, Xuhui and Wang, Rui-wu},
abstractNote = {Agricultural and industrial activities have increased atmospheric nitrogen (N) deposition to ecosystems worldwide. N deposition can stimulate plant growth and soil carbon (C) input, enhancing soil C storage. Changes in microbial decomposition could also influence soil C storage, yet this influence has been difficult to discern, partly because of the variable effects of added N on the microbial enzymes involved. We show, using meta-analysis, that added N reduced the activity of lignin-modifying enzymes (LMEs), and that this N-induced enzyme suppression was associated with increases in soil C. In contrast, N-induced changes in cellulase activity were unrelated to changes in soil C. Moreover, the effects of added soil N on LME activity accounted for more of the variation in responses of soil C than a wide range of other environmental and experimental factors. Our results suggest that, through responses of a single enzyme system to added N, soil microorganisms drive long-term changes in soil C accumulation. Incorporating this microbial influence on ecosystem biogeochemistry into Earth system models could improve predictions of ecosystem C dynamics.},
doi = {10.1126/sciadv.aaq1689},
journal = {Science Advances},
number = [8],
volume = [4],
place = {United States},
year = {2018},
month = {8}
}

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Cited by: 11 works
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    Works referencing / citing this record:

    Anthropogenic N deposition, fungal gene expression, and an increasing soil carbon sink in the Northern Hemisphere
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